NbOAuth2AuthStrategy show errors from login response

[GiamBoscaro]

Issue type

• bug report
• feature request
• question about the decisions made in the repository

Issue description

I have setup a login through Keycloak. When I login with wrong credentials, I do see Keycloak responding with "Invalid credentials". I would like to display this error, but "Something went wrong" is always shown. How can I show the error coming from Keycloak? I have already checked similar issues like #442 and #1835 but there is no "errors" property in the NbOAuth2AuthStrategy setup.

Current behavior:
When I login with invalid credentials, the error "Something went wrong" is shown.

Expected behavior:
The error in the login response should be shown

Steps to reproduce:
Login with invalid credentials using the NbOAuth2AuthStrategy

Related code:

NbOAuth2AuthStrategy.setup({
        name: 'keycloak',
        baseEndpoint: environment.keycloak.uri,
        clientId: environment.keycloak.client_id,
        clientSecret: environment.keycloak.client_secret,
        clientAuthMethod: NbOAuth2ClientAuthMethod.BASIC,
        authorize: {
          endpoint: '/auth',
          responseType: NbOAuth2ResponseType.TOKEN,
        },
        token: {
          endpoint: '/token',
          grantType: NbOAuth2GrantType.PASSWORD,
          class: NbAuthOAuth2JWTToken,
        },
        refresh: {
          endpoint: '/token',
          grantType: NbOAuth2GrantType.REFRESH_TOKEN,
        },
      })

Other information:

node v14.21.3

Angular, Nebular

Angular 13.3.12
Nebular 9.1.0-rc.8